We pick g.root-servers.net, one of the 13 root servers (1), and ask it about vnexpress.vn and learn that vn is delegated to seven name servers (2), so we ask d.dns-servers.vn where we learn that vnexpress.vn is delegated to two name servers, including dns1.fpt.vn (3), so we ask that one where we see a CNAME from vnexpress.vn to vnexpress.net, so we have to start all over again. We pick k.root-servers.net, one of the 13 root servers (4), and ask it about vnexpress.net and learn that net is delegated to 13 name servers (5), so we ask a.gtld-servers.net where we learn that vnexpress.net is delegated to two name servers, including ns2.gate.vn (6), so we ask that one and get the following answer: